Optics and related imaging technologies have played an indispensable role in the development of natural science. However, one of the fundamental problems that cannot be overcome even with the most advanced optical technology is scattering and fluctuations that disturb the straightness of propagating light. Scattering theories determined by wavelength and particle size have already been established. Adaptive optics is also established to compensate the light distortion in astronomy. But, there is no theory that comprehensively deals with scattering and fluctuations in four dimensions (three-dimensional space and time), which are ubiquitous in the real world of air, water, and living organisms.

The purpose of this conference is to present and discuss the latest techniques, theories, and results for comprehensively understanding and overcoming scattering and fluctuation phenomena that are ubiquitous in multi-scale 3D space, ranging from submicrometer to kilometer size. Applications include bioimaging, spatial information communication, astronomy, and other areas related to scattering and fluctuations. It features a new approach based on digital twin, which integrates physical and virtual worlds, including measurement techniques of scattering and fluctuation fields, active corrections of distorted light, and modeling of scattering and fluctuation fields. We are very welcome to join this conference for presentations and exchange of ideas.